Vibration motor
By increasing the weight of the mass block in the vibration motor and optimizing the connection structure of the oscillator assembly, the shortcomings of linear vibration motors in terms of miniaturization and vibration performance have been solved, achieving a strong vibration effect.
Patent Information
- Application Number
- CN202422926812.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-11-29
AI Technical Summary
Existing linear vibration motors are insufficient in meeting the requirements of miniaturization and vibration performance, especially due to insufficient internal space in the housing, which leads to weakened vibration.
A vibration motor was designed. By setting a step and a limiting structure inside the housing to increase the weight of the mass block, and by optimizing the connection of the oscillator assembly through elastic elements and limiting components, the vibration space and vibration intensity are ensured.
Within a limited space, the vibration sensation of the vibration motor is enhanced, while also meeting the miniaturization requirements of electronic devices.
Smart Images
Figure CN223553199U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of haptic feedback motor technology, and in particular to a vibration motor. Background Technology
[0002] With the development of electronic technology, portable consumer electronics products have gradually occupied the global consumer market, such as mobile phones, handheld game consoles, and multimedia entertainment devices. These electronic products generally use linear vibration motors for haptic feedback, such as incoming call notifications on mobile phones and vibration feedback on game consoles. To meet such a wide range of applications, the requirements for miniaturization and vibration performance of linear vibration motors are becoming increasingly stringent.
[0003] Existing linear vibratory motors convert electrical energy into linear mechanical energy. They move a magnet by means of the repulsion or attraction of a coil, thus causing the mass block to vibrate. A typical linear vibratory motor includes a housing, a cover, an oscillator, a stator, and springs. The housing and cover are welded together to form a housing space, within which the oscillator, stator, and springs are placed. The oscillator includes a mass block and a magnet, while the stator includes a coil and a flexible circuit board. Magnets are positioned on the mass block corresponding to the coil positions. Springs are positioned between the mass block and the side walls of the housing, elastically suspending the oscillator within the housing space. Simultaneously, the coil is electrically connected to the flexible circuit board, which is connected to an external power source, changing the direction of the current in the coil to achieve the vibration output of the mass block. However, with changing usage requirements, existing linear motors now often have stepped sections in the housing to allow the flexible circuit board to connect to an external power source and to weld springs, thus reducing the internal housing space of the existing motor.
[0004] Therefore, there is an urgent need for a linear vibration motor with a simple structure and strong vibration to solve the technical problems of existing vibration motors. Utility Model Content
[0005] The purpose of this utility model is to provide a vibration motor with a simple structure and strong vibration, and its specific technical solution is as follows:
[0006] A vibration motor includes a rectangular shell with one opening, a cover, an oscillator assembly, a stator assembly, and an elastic element. The shell and the cover are fastened together to form an accommodating space. The two sides of the oscillator assembly are elastically connected to the shell through the elastic element. The stator assembly is fixed to the cover. The oscillator assembly includes a mass block and a permanent magnet. The oscillator assembly and the stator assembly are spaced vertically apart within the accommodating space. The shell includes a bottom wall, two short side walls, and two long side walls. One of the long side walls includes a main part and a first step portion and a second step portion located below the main part and on both sides thereof. The mass block has a first boss protruding from one side surface of the main part.
[0007] Preferably, the elastic element includes horizontally arranged connecting portions on both sides of the short side and inclined elastic arms connected to both sides of the connecting portions, with a clearance groove formed between the elastic arms.
[0008] Preferably, the long side wall opposite the first stepped portion is provided with a third stepped portion, and the second stepped portion and the third stepped portion are located diagonally opposite the two long side walls.
[0009] Preferably, the mass block has a recessed mounting groove at the center of its surface facing the cover, and the permanent magnet is completely embedded in the mounting groove; the mass block has protruding welding platforms at the four corners of its surface facing the long side wall; one end of the connecting part is connected to the second step or the third step, and the other end is connected to the welding platform; the end surfaces of the mass block on both sides of the mounting groove have second protrusions facing the cover.
[0010] Preferably, the first boss protrudes from the position corresponding to the relief groove, and the projected area of the first boss is smaller than the projected area of the relief groove.
[0011] Preferably, the first boss protrudes at the position corresponding to the second step portion, and the first boss protrudes onto the welding platform.
[0012] Preferably, the stator assembly includes a flexible circuit board and a coil. The flexible circuit board includes an internal power terminal and an external power terminal. The internal power terminal is located between the cover and the coil, and the external power terminal extends from the accommodating space and is fixed to the outer surface of the first step portion.
[0013] Preferably, the inner surface of the cover is provided with a first limiting part and a second limiting part located on both sides of the first limiting part, and the second limiting part is provided corresponding to the second protrusion.
[0014] Preferably, the height of the second limiting portion is less than the height of the first limiting portion; the thickness of the internal electrical terminal is less than the height of the second limiting portion.
[0015] Preferably, the coil and the internal electrical terminal are wound around the first limiting portion; the coil and the internal electrical terminal are located between the second limiting portion.
[0016] Compared with the prior art, this utility model provides a vibration motor with a simple structure, which maximizes the weight of the mass block in the accommodating space of the existing vibration motor, thereby improving the vibration sensation of the vibration motor, and at the same time, it also meets the miniaturization requirements of electronic devices for vibration motors. Attached Figure Description
[0017] Figure 1 This is a perspective view of the vibration motor according to the first embodiment.
[0018] Figure 2 This is an exploded view of the structure of the sex vibration motor according to the first embodiment.
[0019] Figure 3 This is an exploded view of the stator assembly structure according to the first embodiment.
[0020] Figure 4 This is a cross-sectional view of the vibration motor in the XY direction according to the first embodiment.
[0021] Figure 5 This is a cross-sectional view of the vibration motor in the XZ direction according to the first embodiment.
[0022] Figure 6 This is a three-dimensional view of the mass block in the first embodiment.
[0023] Figure 7 This is a cross-sectional view of the vibration motor in the YZ direction according to the first embodiment.
[0024] Figure 8 This is a three-dimensional view of the mass block in the second embodiment.
[0025] Figure 9 This is a cross-sectional view of the vibration motor in the XY direction according to the second embodiment.
[0026] in:
[0027] 1-Shell; 10-Main body; 11-First step; 12-Second step; 13-Third step;
[0028] 2-Cover; 20-First limiting part; 21-Second limiting part;
[0029] 3-Stator assembly; 30-Flexible circuit board; 31-Coil; 301-Internal connection terminal; 302-External connection terminal;
[0030] 4-Oscillator assembly; 40-Mass block; 41-Permanent magnet; 400-Mounting slot; 401-First boss;
[0031] 402 - Welding station; 403 - Second boss; 4000 - Glue dispensing tank;
[0032] 5-Elastic element; 50-Connecting part; 51-Elastic arm; 500-Relief groove;
[0033] 6-Damping components;
[0034] 7-Gasket. Detailed Implementation
[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0036] The structure of a vibration motor according to the first embodiment of this utility model is as follows: Figures 1 to 7 As shown, the device includes a rectangular shell 1 with one opening, a cover 2, a stator assembly 3, an oscillator assembly 4, and an elastic element 5. The shell 1 and the cover 2 are fastened together to form an accommodating space (not shown). The stator assembly 3 is fixed on the cover 2. The two sides of the oscillator assembly 4 are elastically connected to the shell 1 through the elastic element 5. The oscillator assembly 4 and the stator assembly 3 are placed vertically and vertically in the accommodating space.
[0037] The housing 1 includes a bottom wall (not shown), two short side walls (not shown), and two long side walls (not shown). One of the long side walls includes a main part 10 and a first step part 11 and a second step part 12 located on both sides of the main part 10. The other long side wall opposite the first step part 11 is provided with a third step part 13. The second step part 12 and the third step part 13 are located at diagonal positions of the two long side walls. In this embodiment, the second step part 12 and the third step part 13 have the same height. The second step part 12 is shorter than the first step part 11. In order to maintain the vibration space from the second step part 12 to the oscillator assembly 4 and the vibration space from the first step part 11 to the oscillator assembly 4, a gasket 7 is provided between the elastic member 5 and the second step part 12.
[0038] The inner surface of the cover 2 has a first limiting part 20 protruding at the center and a second limiting part 21 located on both sides of the first limiting part 20. The height of the second limiting part 21 is less than the height of the first limiting part 20.
[0039] The stator assembly 3 includes a flexible circuit board 30 and a coil 31. The flexible circuit board 30 includes an internal power terminal 301 and an external power terminal 302. The internal power terminal 301 is located between the cover 2 and the coil 31. The coil 31 and the internal power terminal 301 are wound around a first limiting part 20. The first limiting part 20 is used to position the coil 31 and the internal power terminal 301. The coil 31 and the internal power terminal 301 are located between a second limiting part 21. The thickness of the internal power terminal 301 is less than the height of the second limiting part 21, thereby preventing the vibrator assembly from impacting the coil 31 during reciprocating vibration and affecting the motor performance. The external power terminal 302 is extended from the accommodating space and fixed to the outer surface of the first step part 11. The height of the first step part 11 is greater than or equal to the external power terminal 302 to save space occupied by the vibration motor in the electronic device (not shown).
[0040] The oscillator assembly 4 includes a mass block 40 and a permanent magnet 41. The mass block 40 has a recessed mounting groove 400 at the center of its surface facing the cover 2. The permanent magnet 41 is completely embedded in the mounting groove 400. The mounting groove 400 is square, and its inner walls have recessed glue-filling grooves 4000. After the permanent magnet 41 is embedded in the mounting groove 400, glue is injected into the glue-filling grooves 4000 to enhance the bonding stability between the permanent magnet 41 and the mass block 40. The mass block 40 has a protrusion on one side of its surface facing the main body 10. A first protrusion 401 is provided, and welding platforms 402 protrude from the four corners of the long side wall of the mass block 40. Second protrusions 403 protrude from the end surfaces of the mass blocks 40 on both sides of the mounting groove 400 towards the cover 2. During the reciprocating vibration of the vibrator assembly 4, the second limiting part 21 and the second protrusions 403 are correspondingly provided to limit the gap between the vibrator assembly 4 and the housing 1, preventing the vibrator assembly 4 from shifting too much during vibration and impacting the coil 31, thus affecting the performance of the vibration motor. In this embodiment, within the limited existing space of a conventional vibration motor, the mass block 40, through the protruding first protrusion 401, welding platforms 402, and second protrusions 403, increases its weight and enhances the vibration feel of the vibration motor.
[0041] The elastic element 5 includes connecting portions 50 on both sides of its short side and elastic arms 51 connected to both sides of the connecting portions 50, with a clearance groove 500 formed between the elastic arms 51; one end of the connecting portion 50 of the elastic element 5 on the upper and lower sides of the oscillator assembly 4 is connected to the second step portion 12 or the third step portion 13, and the other end is connected to the welding table 402, wherein the second step portion 12 and the third step portion 13 protrude from the housing 1 into the accommodating space. Both the welding platform 402 protruding from the mass block 40 and the 3 can serve as a pre-positioning mechanism for the connection part, and at the same time, it is more convenient to weld and fix the elastic element 5 to the housing 1 and the oscillator assembly 4 respectively. The first boss 401 is protruding at the position corresponding to the relief groove 500. The projected area of the first boss 401 is smaller than the projected area of the relief groove 500. When the oscillator assembly 4 is reciprocating, the relief groove 500 can be used to pass through the first boss 401 to avoid the first boss 401 hitting the elastic element 5. The height of the main part 10 of the housing 1 is set to allow the first boss 401 to pass through, so as to avoid the first boss 401 hitting the housing 1. In order to ensure that the oscillator assembly 4 hits the long side walls on both sides during reciprocating vibration, damping elements 6 are provided between the connection part 50 which is welded and fixed to the welding platform 402 and the long side walls respectively.
[0042] The structure of a vibration motor according to the second embodiment of this utility model is as follows: Figures 4 to 7 As shown, as an alternative to the first embodiment, the first boss 401 is protruding at the position corresponding to the second step portion 12. The first boss 401 protrudes on the welding table 402. In order to ensure the reciprocating vibration space of the oscillator assembly 3, no gasket 7 is provided between the second step portion 12 and the connection portion 50 of the elastic member 5.
[0043] It should be noted that in the description of this utility model, the terms "upper", "lower", "front", "rear", "left", "horizontal direction", "vertical direction", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A vibration motor, comprising a rectangular shell with one open side, a cover, an oscillator assembly, a stator assembly, and an elastic element, wherein the shell and the cover are fastened together to form an accommodating space, the two sides of the oscillator assembly are elastically connected to the shell via the elastic element, the stator assembly is fixed to the cover, the oscillator assembly includes a mass block and a permanent magnet, and the oscillator assembly and the stator assembly are vertically spaced within the accommodating space, characterized in that... The shell includes a bottom wall, two short side walls and two long side walls, wherein one of the long side walls includes a main part and a first step part and a second step part located on both sides of the main part, and the mass block has a first boss protruding from one side surface of the main part.
2. The vibration motor according to claim 1, characterized in that, The elastic element includes horizontally arranged connecting portions on both sides of the short side and inclined elastic arms connected to both sides of the connecting portions, with a clearance groove formed between the elastic arms.
3. The vibration motor according to claim 2, characterized in that, A third step is provided on the long side wall opposite to the first step, and the second step and the third step are located diagonally opposite the long side walls on both sides.
4. The vibration motor according to claim 3, characterized in that, The mass block has a recessed mounting groove at the center of its surface facing the cover, and the permanent magnet is completely embedded in the mounting groove; the mass block has protruding welding platforms at the four corners of its surface facing the long side wall; one end of the connecting part is connected to the second step or the third step, and the other end is connected to the welding platform; the end surfaces of the mass blocks on both sides of the mounting groove have second protrusions facing the cover.
5. The vibration motor according to claim 4, characterized in that, The first boss protrudes from the position corresponding to the relief groove, and the projected area of the first boss is smaller than the projected area of the relief groove.
6. The vibration motor according to claim 4, characterized in that, The first boss protrudes at the position corresponding to the second step and is located on the welding platform.
7. The vibration motor according to claim 4, characterized in that, The stator assembly includes a flexible circuit board and a coil. The flexible circuit board includes an internal power terminal and an external power terminal. The internal power terminal is located between the cover and the coil. The external power terminal extends from the accommodating space and is fixed to the outer surface of the first step portion.
8. The vibration motor according to claim 7, characterized in that, The inner surface of the cover is provided with a first limiting part and a second limiting part located on both sides of the first limiting part at the center position, and the second limiting part is provided in correspondence with the second protrusion.
9. The vibration motor according to claim 8, characterized in that, The height of the second limiting part is less than the height of the first limiting part; the thickness of the internal electrical terminal is less than the height of the second limiting part.
10. The vibration motor according to claim 9, characterized in that, The coil and the internal electrical terminal are wound around the first limiting part; the coil and the internal electrical terminal are located between the second limiting part.